PCA9551PW: 8位I2C总线LED驱动器,具有可编程闪烁速率

PCA9551 LED闪烁器可在I²C总线和SMBus应用中闪烁LED,而在这些应用中有必要限制总线流量或释放I²C总线主机(MCU、MPU、DSP、芯片组等)定时器。该器件的独特之处是集成内部振荡器,提供两种可编程闪烁速率。若要使用普通的I/O扩展器(如PCF8574或PCA9554)闪烁LED,则总线主机必须发送重复命令,开启和关闭LED。这可极大地增加I²C总线上的流量,并耗尽主机的其中一个定时器。而PCA9551 LED闪烁器仅需初始设置命令便可编程闪烁速率1和闪烁速率2(如频率和占空比),用于各独立输出。在此之后,只需总线主机发出一条命令,便可开启或关闭各开漏输出,或者在闪烁速率1或闪烁速率2之间循环切换。最大输出吸电流为每位25 mA,以及每封装100 mA。

任何未用于控制LED的位都可用作通用并行输入/输出(GPIO)扩展。

低电平有效硬件复位针脚(RESET)和上电复位(POR)可将寄存器初始化为它们的默认状态(全零),使位变为高电平(LED关闭)。

PCA9551上的3个硬件地址针脚允许在一条总线上运行8个器件。

较新的超快速模式(Fm+) PCA9634 8位LED控制器为每个通道提供独立的PWM调光控制,以获得更佳的色彩混合能力;而全局PWM用于同时对所有通道进行调光或闪烁。共有126种可能的地址组合,并且最大输出吸电流为每位25 mA、每封装200 mA。

PCA9551PW: 产品结构框图
Outline 3d SOT403-1
数据手册 (1)
名称/描述Modified Date
8-bit I2C-bus LED driver with programmable blink rates (REV 8.0) PDF (156.0 kB) PCA9551 [English]31 Jul 2008
应用说明 (4)
名称/描述Modified Date
Level shifting techniques in I2C-bus design (REV 1.0) PDF (52.0 kB) AN10441 [English]20 Jun 2007
I2C manual (REV 1.0) PDF (4.2 MB) AN10216 [English]27 Mar 2003
I2C 2002-1A Evaluation Board (REV 2.0) PDF (2.2 MB) AN10146 [English]26 Feb 2003
I2C Devices for LED Display Control (REV 1.0) PDF (1.0 MB) AN264 [English]22 Jul 2002
用户指南 (4)
名称/描述Modified Date
I2C-bus specification and user manual (REV 6.0) PDF (1.4 MB) UM10204 [English]28 Apr 2014
I2C-bus specification and user manual (REV 5.0) PDF (1.6 MB) UM10204_JA [English]03 Apr 2013
PCA9633 demonstration board OM6282 (REV 1.0) PDF (337.0 kB) UM10317 [English]15 Dec 2008
I2C Demonstration Board 2005-1 Quick Start Guide (REV 1.0) PDF (261.0 kB) UM10206 [English]13 Jun 2006
手册 (6)
名称/描述Modified Date
NXP® I2C-bus solutions 2014: Smart, simple solutions for the 12 most common design concerns (REV 1.0) PDF (3.5 MB) 75017540 [English]01 Aug 2014
LED controllers: Voltage-switch drivers, constant-current drivers, and Flash LED drivers (REV 1.0) PDF (2.7 MB) 75017588 [English]03 Jul 2014
Evaluate the I2C-bus with a comprehensive kit; NXP® I2C 2002-1A evaluation board kits OM6285 and OM6278 (REV 1.0) PDF (1.8 MB) 75016531 [English]01 Jul 2008
Create smarter, more efficient white goods; An industry-leading portfolio of cost-effective, power-saving solutions for... (REV 1.0) PDF (1.1 MB) 75016543 [English]01 Jun 2008
LED blinking with GPIO expansion; NXP® 2/4/8/16-bit I2C/SMBus LED blinkers PCA9550/51/52/53 (REV 1.0) PDF (219.0 kB) 75016021 [English]01 Jun 2007
LED dimming with GPIO expansion; NXP® 2/4/8/16-bit I2C/SMBus LED dimmers PCA9530/31/32/33 (REV 1.0) PDF (212.0 kB) 75016073 [English]01 Jun 2007
封装信息 (1)
名称/描述Modified Date
plastic thin shrink small outline package; 16 leads; body width 4.4 mm (REV 1.0) PDF (300.0 kB) SOT403-1 [English]08 Feb 2016
包装 (1)
名称/描述Modified Date
TSSOP16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or... (REV 1.0) PDF (218.0 kB) SOT403-1_118 [English]08 Apr 2013
报告或演示文稿 (1)
名称/描述Modified Date
design_con_2003_tecforum_i2c_b_1 (REV 0.1) PDF (4.2 MB) DESIGN_CON_2003_TECFORUM_I2C_B_1 [English]27 Jan 2003
支持信息 (1)
名称/描述Modified Date
Footprint for wave soldering (REV 1.0) PDF (16.0 kB) SSOP-TSSOP-VSO-WAVE [English]08 Oct 2009
IBIS
订购信息
型号状态Package version应用EnableOperating Temperature (Cel)PWMsI2C-bus interfaceReset input pinI2C-bus (kHz)Operating voltage (VDC)Max Sink Current per bit (mA)No of AddressesMax Sink Current, per package (mA)Number of bits
PCA9551PWActiveSOT403-1-40~852 (40 Hz to 6.4 sec)yes4002.3~5.52581008
PCA9551PW/GNo Longer ManufacturedSOT403-1-40~852 (40 Hz to 6.4 sec)yes4002.3~5.52581008
封装环保信息
产品编号封装说明Outline Version回流/波峰焊接包装产品状态部件编号订购码 (12NC)Marking化学成分RoHS / 无铅 / RHF无铅转换日期EFRIFR(FIT)MTBF(小时)MSLMSL LF
PCA9551PWSOT403-1SSOP-TSSOP-VSO-WAVEReel 13" Q1/T1ActivePCA9551PW,118 (9352 716 92118)PCA9551PCA9551PWweek 48, 20040.02.05E811
Bulk PackActivePCA9551PW,112 (9352 716 92112)PCA9551PCA9551PWweek 48, 20040.02.05E811
8-bit I2C-bus LED driver with programmable blink rates PCA9551
Level shifting techniques in I2C-bus design pca9685pw
I2C manual se98apw
I2C 2002-1A Evaluation Board lm75a
I2C Devices for LED Display Control PCA9553
I2C-bus specification and user manual pca9685pw
I2C-bus specification and user manual pca9685pw
PCA9633 demonstration board OM6282 pca9685pw
I2C Demonstration Board 2005-1 Quick Start Guide pca9685pw
NXP® I2C-bus solutions 2014: Smart, simple solutions for the 12 most common design concerns pca9685pw
LED controllers: Voltage-switch drivers, constant-current drivers, and Flash LED drivers pca9685pw
Evaluate the I2C-bus with a comprehensive kit; NXP® I2C 2002-1A evaluation board kits OM6285 and OM6278 lm75a
Create smarter, more efficient white goods; An industry-leading portfolio of cost-effective, power-saving solutions for... PMEG6010CE_AUTOMOTIVE
LED blinking with GPIO expansion; NXP® 2/4/8/16-bit I2C/SMBus LED blinkers PCA9550/51/52/53 PCA9553
LED dimming with GPIO expansion; NXP® 2/4/8/16-bit I2C/SMBus LED dimmers PCA9530/31/32/33 PCA9551
design_con_2003_tecforum_i2c_b_1 lm75a
PCA9551 IBIS model PCA9551PW
SOT403-1 LPC812M101JDH16
SSOP-TSSOP-VSO-WAVE LPC1114FDH28
Reel 13" Q1/T1 LPC812M101JDH16
PCA9551
PCA9633